1、 ETSI TS 184 006 V2.1.1 (2008-09)Technical Specification Telecommunications and Internet converged Services andProtocols for Advanced Networking (TISPAN);Interconnection and Routeing requirements related toNumbering and Naming for NGNs;NAR InterconnectETSI ETSI TS 184 006 V2.1.1 (2008-09)2Reference
2、DTS/TISPAN-04006-NGN-R2 Keywords addressing, name ETSI 650 Route des Lucioles F-06921 Sophia Antipolis Cedex - FRANCE Tel.: +33 4 92 94 42 00 Fax: +33 4 93 65 47 16 Siret N 348 623 562 00017 - NAF 742 C Association but non lucratif enregistre la Sous-Prfecture de Grasse (06) N 7803/88 Important noti
3、ce Individual copies of the present document can be downloaded from: http:/www.etsi.org The present document may be made available in more than one electronic version or in print. In any case of existing or perceived difference in contents between such versions, the reference version is the Portable
4、 Document Format (PDF). In case of dispute, the reference shall be the printing on ETSI printers of the PDF version kept on a specific network drive within ETSI Secretariat. Users of the present document should be aware that the document may be subject to revision or change of status. Information on
5、 the current status of this and other ETSI documents is available at http:/portal.etsi.org/tb/status/status.asp If you find errors in the present document, please send your comment to one of the following services: http:/portal.etsi.org/chaircor/ETSI_support.asp Copyright Notification No part may be
6、 reproduced except as authorized by written permission. The copyright and the foregoing restriction extend to reproduction in all media. European Telecommunications Standards Institute 2008. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTM, TIPHONTM, the TIPHON logo and the ETSI logo are Trade Marks
7、 of ETSI registered for the benefit of its Members. 3GPPTM is a Trade Mark of ETSI registered for the benefit of its Members and of the 3GPP Organizational Partners. ETSI ETSI TS 184 006 V2.1.1 (2008-09)3Contents Intellectual Property Rights 4g3Foreword . 4g31 Scope 5g32 References 5g32.1 Normative
8、references . 5g32.2 Informative references 6g33 Abbreviations . 7g34 Introduction 7g35 Routeing Model for NGN Interconnection. 8g35.1 Reference scheme for interconnection . 8g35.2 Interconnection and Routeing. 8g35.3 Transit capabilities . 9g35.4 Example of complete set of CPs roles . 10g35.5 Routei
9、ng process requirements and related CP roles . 11g35.6 SIP and E.164 numbering . 12g35.7 Address Resolution, Routeing requirements 13g35.7.1 tel URI and SIP URI resolution requirements and procedures . 15g35.8 Relation with NAR Interconnection general framework 17g36 Interconnection, interworking, i
10、nterface and routeing requirements . 17g36.1 Interconnection NNI in IMS and NGN architecture . 18g36.2 Transit network scenarios . 19g36.3 Application to different NGN scenarios . 21g3Annex A (informative): Protocols at the NNI points and interworking 22g3Annex B (informative): SIP Header Fields at
11、the NNI relevant to routing and identification 24g3History 27g3ETSI ETSI TS 184 006 V2.1.1 (2008-09)4Intellectual Property Rights IPRs essential or potentially essential to the present document may have been declared to ETSI. The information pertaining to these essential IPRs, if any, is publicly av
12、ailable for ETSI members and non-members, and can be found in ETSI SR 000 314: “Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web se
13、rver (http:/webapp.etsi.org/IPR/home.asp). Pursuant to the ETSI IPR Policy, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may
14、be, or may become, essential to the present document. Foreword This Technical Specification (TS) has been produced by ETSI Technical Committee Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN). ETSI ETSI TS 184 006 V2.1.1 (2008-09)51 Scope The present
15、document analyzes the issues concerned with interconnection and routeing in NGN and their implications and requirements for numbering, naming and addressing and related resolution functionalities. Several different interconnection scenarios are considered, based on TISPAN “NGN Functional Architectur
16、e“ (5), although not all require the use of all architectural functions. The role of the transit network has also been considered in order to evaluate the knowledge of numbers/names served by different operators and related requirements for routing purposes. Some scenarios may require the availabili
17、ty of infrastructure systems for numbering/naming resolutions, such as infrastructure ENUM, or other database based system for route resolution, and may require coordinated provision by involved operators. The present document focuses on calls routed between subscribers identified by E.164 numbers,
18、coded through either tel URI and SIP URI formats. It also applies only to the transfer of calls across interconnection points between the home network of the A-Party and the home network of the B-Party. It does not consider in detail interconnections needed to support roaming scenarios. A further is
19、sue of the present document will consider interconnect scenarios related to roaming. The present document is relevant not just to IMS but to any NGN SIP-based interconnection. 2 References References are either specific (identified by date of publication and/or edition number or version number) or n
20、on-specific. For a specific reference, subsequent revisions do not apply. Non-specific reference may be made only to a complete document or a part thereof and only in the following cases: - if it is accepted that it will be possible to use all future changes of the referenced document for the purpos
21、es of the referring document; - for informative references. Referenced documents which are not found to be publicly available in the expected location might be found at http:/docbox.etsi.org/Reference. For online referenced documents, information sufficient to identify and locate the source shall be
22、 provided. Preferably, the primary source of the referenced document should be cited, in order to ensure traceability. Furthermore, the reference should, as far as possible, remain valid for the expected life of the document. The reference shall include the method of access to the referenced documen
23、t and the full network address, with the same punctuation and use of upper case and lower case letters. NOTE: While any hyperlinks included in this clause were valid at the time of publication ETSI cannot guarantee their long term validity. 2.1 Normative references The following referenced documents
24、 are indispensable for the application of the present document. For dated references, only the edition cited applies. For non-specific references, the latest edition of the referenced document (including any amendments) applies. 1 Void. 2 ETSI TS 181 005: “Telecommunications and Internet converged S
25、ervices and Protocols for Advanced Networking (TISPAN); Services and Capabilities Requirements“. ETSI ETSI TS 184 006 V2.1.1 (2008-09)63 ETSI TS 182 012: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IMS-based PSTN/ISDN Emulation Sub-system (PES)
26、; Functional architecture“. 4 ETSI ES 282 007: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IP Multimedia Subsystem (IMS); Functional architecture“. 5 ETSI ES 282 001: “Telecommunications and Internet converged Services and Protocols for Advance
27、d Networking (TISPAN); NGN Functional Architecture“. 6 ETSI ES 283 018: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Resource and Admission Control: H.248 Profile for controlling Border Gateway Functions (BGF) in the Resource and Admission Contr
28、ol Subsystem (RACS); Protocol specification“. 7 ETSI ES 283 003: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); IP Multimedia Call Control Protocol based on Session Initiation Protocol (SIP) and Session Description Protocol (SDP) Stage 3 3GPP TS 2
29、4.229 Release 7, modified“. 8 ETSI TS 123 228: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); IP Multimedia Subsystem (IMS); Stage 2 (3GPP TS 23.228 version 7.5.0 Release 7)“. 9 ITU-T Recommendation Q.3401: “NGN NNI Signalling Profile (Prot
30、ocol Set 1)“. 10 ETSI EN 383 001: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Interworking between Session Initiation Protocol (SIP) and Bearer Independent Call Control (BICC) Protocol or ISDN User Part (ISUP) ITU-T Recommendation Q.1912.5, mod
31、ified“. 11 ETSI TS 123 228: “IP Multimedia Subsystem (IMS); Stage 2“. 12 ETSI TS 124 228: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Signalling flows for the IP multimedia call control based on Session Initiation Protocol (SIP) and Sess
32、ion Description Protocol (SDP); Stage 3 (3GPP TS 24.228 Release 5)“. 13 ETSI TS 124 229: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Internet Protocol (IP) multimedia call control protocol based on Session Initiation Protocol (SIP) and S
33、ession Description Protocol (SDP); Stage 3 (3GPP TS 24.229 Release 8)“. 14 ETSI TS 129 163: “Digital cellular telecommunications system (Phase 2+); Universal Mobile Telecommunications System (UMTS); Interworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) net
34、works (3GPP TS 29.163 Release 7)“. 15 ETSI TS 184 002: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); Identifiers (IDs) for NGN“. 16 Void. 17 ITU-T Recommendation E.164: “The international public telecommunication numbering plan“. 18 IETF RFC 3261
35、: “SIP: Session Initiation Protocol“. 2.2 Informative references The following referenced documents are not essential to the use of the present document but they assist the user with regard to a particular subject area. For non-specific references, the latest version of the referenced document (incl
36、uding any amendments) applies. i.1 ETSI TR 180 000: “Telecommunications and Internet converged Services and Protocols for Advanced Networking (TISPAN); NGN Terminology“. ETSI ETSI TS 184 006 V2.1.1 (2008-09)7i.2 ETSI TR 184 007: “Telecommunications and Internet converged Services and Protocols for A
37、dvanced Networking (TISPAN); Naming/Numbering Address Resolution (NAR)“. 3 Abbreviations For the purposes of the present document, the following abbreviations apply: 3GPP 3rd Generation Partnership Project BGCF Breakout Gateway Control Function BICC Bearer-Independent Call Control CP Communication P
38、rovider DNS Domain Name System ENUM E.164 telephone NUmber Mapping GRX GRPS Roaming eXchange GSMA GSM Association IBCF Interconnection Border Control Function I-CSCF Interrogating-Call/Session Control Function I-ENUM Infrastructure ENUM IETF Internet Engineering Task Force IMS IP Multimedia System I
39、PX IP Packet eXchangeISUP ISDN Signalling User Part IWF InterWorking Function MGCF Media Gateway Control Function NAR Naming/Numbering Addressing Resolution NGN Next generation Network NNI Network to Network Interface OPID Originating Party IDentity P-CSCF Proxy-Call/Session Control Function PES PST
40、N Emulation Service PSTN Public Switched Telephone Network RACS Resource and Admission Control Subsystem S-CSCF Serving-Call/Session Control Function SDP Session Description Protocol SIP Session Initiation Protocol TPID Terminating Party IDentity UA User Agent URI Uniform Resource Identifier 4 Intro
41、duction This Technical Specification: Defines a Routeing Model for NGN Interconnection. Proposes the first set of Requirements and related CP Routeing Roles. Defines the resolution process for tel URI and SIP URI. Proposes the possible basic structure of NAR i.2 Interconnect Framework. ETSI ETSI TS
42、184 006 V2.1.1 (2008-09)85 Routeing Model for NGN Interconnection 5.1 Reference scheme for interconnection Figure 1 describes the NGN layers and the reference scheme for interconnection in NGN. The routeing resolution in NGN includes both the typical IP interworking routeing rules that are bounded i
43、nto the transport layer and the service/control layer ones. Transport Layer Service/Control Layer Transport Layer Service/Control Layer Network A Network B NTP NTP NNI Signalling E.164 number IP address Figure 1: Reference scheme for Interconnection and routeing The call control and service control
44、functions take into account service capabilities requirements for routeing. Some applications entities (for instance redirect servers and/or location application) may also be required to define the route. For the purpose of interconnection the Call Control function has to resolve routeing in order t
45、o get the next hop and reach the required destination (the transport layer has to allocate the resource required based on the services characteristics). As a consequence, the NGN routeing determination process includes both service and transport functions to define the correct destination and requir
46、es an appropriate service transport resources allocation at the interconnection level. The functionalities used for routeing at the transport layer follow the existing IP intrinsic routeing mechanisms, and have also to satisfy the NGN service requirements and the transport resource requirements (RAC
47、S function 4, 5). Therefore routeing resolution at transport layer is outside the scope of the present document. The destination number/name and the type of service required are essential to identify the route for service layer routeing. The ETSI standards on NGN public identity 15 state that E.164
48、numbering is the main customer identification scheme. However in addition domain name based identifiers can be also used. In the case of the SIP protocol, as defined in relevant ETSI standards (7), such public identifiers are carried through so-called SIP URI (i.e. SIP URI: ) and tel URI (i.e. tel U
49、RI: ). Public identifiers resolution is an essential part of the routeing process to determine the next hop network entity for the session setup: this entity can either be identified by an intermediate URI translated into an appropriate IP address using DNS functionality, or directly mapped to an IP address. 5.2 Interconnection and Routeing The innovative approach for NGN routeing requires identifying a common routeing model that guarantees interoperability between networks; besides more networks, provided
